This is pretty neat:
http://www.youtube.com/watch?v=5mi0JYNPXxU&feature=fvw

He has 120mph clubhead speed which is not so bad...
What muscles are powering this swing?

Here is a story about Anthony:
http://www.peakperformancegolfswing.com/meet-my-friend/

Regards, Herbert

Shoulders, arms, pecs.

The downswing starts (apx) with a turning of the torso (obliques) and a lowering of the arms (lats and pecs). It is debatable whether subsequent movements like the straightening of the trail arm are 'results' of the motion or separate muscular actions.

Great machine!

Peter